2Archambault L, Barnes B V, Witter J A. 1990. Landscape ecosystems of disturbed oak forests of southeastern Michigan, USA. Canadian Journal of Forest Research, 20: 1570- 1552.
3Arnold D H, Smalley G W, Buckner E R. 1996. Landtypeforest community relationships: A case study on the Mid-Cumberland Plateau. Environment Monitoring and Assessment, 39: 339-352.
4Barnes B V, Pregitzer K S, Spies T A, et al. 1982. Ecological forest site classification. Journal of Forestry, 80:493 - 498.
5Burke A. 2001. Classification and ordination of plant communities of the Naukluft Mountains, Namtbia. Journal of Vegetation Science, 12: 53- 60.
6Cleland D T, Avers P E, Menab W H. 1997. National hierarchical framework of ecological units//Boyce M S, Haney A. Ecosystem management: Applications for sustainable forest and wildlife resources. New Haven: Yale University Press, 181 - 200.
7Hill M O. 1979. DECORANA-A FORTRAN Program for Detrended Correspondence Analysis and Reciprocal Averaging. Ithaca, New York: Cornell University.
8Marshall I B, Smith C A, Selby C. 1996. A national ecological framework for monitoring and reporting on the environmental sustainability in Canada. Environmental Monitoring and Assessment, 39:25 - 38.
9Rowe J S, Sheard J W. 1981. Ecological land classification: A survey approach. Environment Management, 5:451 - 464.
10Spies T A, Barnes B V. 1985. Ecological species groups of upland northern hardwood hemlock forest ecosystems of the Sylvania Recreation Area, Upper Peninsula, Michigan. Canadian Journal of Forest Research, 15(5) : 961 - 972.